ES2124664B1 - METHOD AND DEVICE OF CODING FOR MODULATION BY CODED IMPULSES ADAPTIVE DIFFERENTIAL. - Google Patents

METHOD AND DEVICE OF CODING FOR MODULATION BY CODED IMPULSES ADAPTIVE DIFFERENTIAL.

Info

Publication number
ES2124664B1
ES2124664B1 ES009602387A ES9602387A ES2124664B1 ES 2124664 B1 ES2124664 B1 ES 2124664B1 ES 009602387 A ES009602387 A ES 009602387A ES 9602387 A ES9602387 A ES 9602387A ES 2124664 B1 ES2124664 B1 ES 2124664B1
Authority
ES
Spain
Prior art keywords
adaptive differential
sample
coding
modulation
signal estimate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES009602387A
Other languages
Spanish (es)
Other versions
ES2124664A1 (en
Inventor
Gamazo Jose Miguel Hernandez
Guedan Juan Amengual
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Alcatel Alsthom Compagnie Generale dElectricite
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel Alsthom Compagnie Generale dElectricite
Priority to ES009602387A priority Critical patent/ES2124664B1/en
Priority to CA002233777A priority patent/CA2233777A1/en
Priority to EP98401071A priority patent/EP0954129A1/en
Priority to US09/070,013 priority patent/US20010043655A1/en
Priority to JP10159805A priority patent/JPH11340837A/en
Publication of ES2124664A1 publication Critical patent/ES2124664A1/en
Application granted granted Critical
Publication of ES2124664B1 publication Critical patent/ES2124664B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
    • H04B14/066—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM]
    • H04B14/068—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM] with adaptive feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

Método y dispositivo de codificación por modulación por impulsos codificados diferencial adaptativa. Método de codificación por modulación por impulsos codificados diferencial adaptativa, MICDA, que cumple substancialmente con las Recomendaciones G.726 ó G.727 del CCITT, estando implementado en un codificador MICDA tal que dada una muestra de entrada se obtiene una señal diferencia cuantificada (DQ) sustrayendo de la muestra de entrada un valor estimado de dicha muestra, estimación de señal (SE), tal que se forma un bucle de realimentación que incluye un módulo predictor (27). El módulo predictor (27) calcula, en la trama anterior, la estimación de señal (SE) y una estimación de señal parcial del predictor de sexto orden para la muestra de la trama actual. Por tanto, se paralelizan estas operaciones con otras del algoritmo, acelerándose de modo global la codificación.Adaptive differential encoded pulse modulation coding method and device. Adaptive differential encoded pulse modulation coding method, MICDA, which substantially complies with CCITT Recommendations G.726 or G.727, being implemented in a MICDA encoder such that given an input sample a quantized difference signal (DQ) is obtained ) subtracting from the input sample an estimated value of said sample, signal estimate (SE), such that a feedback loop is formed that includes a predictor module (27). The predictor module (27) calculates, in the previous frame, the signal estimate (SE) and a partial signal estimate of the sixth order predictor for the current frame sample. Therefore, these operations are paralleled with others in the algorithm, globally accelerating the encoding.

ES009602387A 1996-11-12 1996-11-12 METHOD AND DEVICE OF CODING FOR MODULATION BY CODED IMPULSES ADAPTIVE DIFFERENTIAL. Expired - Lifetime ES2124664B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES009602387A ES2124664B1 (en) 1996-11-12 1996-11-12 METHOD AND DEVICE OF CODING FOR MODULATION BY CODED IMPULSES ADAPTIVE DIFFERENTIAL.
CA002233777A CA2233777A1 (en) 1996-11-12 1998-04-29 Method and device for adaptive differential pulse code modulation
EP98401071A EP0954129A1 (en) 1996-11-12 1998-04-30 Method and device for adaptive differential pulse code modulation.
US09/070,013 US20010043655A1 (en) 1996-11-12 1998-04-30 Method and device for adaptive differential pulse code modulation
JP10159805A JPH11340837A (en) 1996-11-12 1998-05-01 Adaptive differential pulse code modulation method and its device

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
ES009602387A ES2124664B1 (en) 1996-11-12 1996-11-12 METHOD AND DEVICE OF CODING FOR MODULATION BY CODED IMPULSES ADAPTIVE DIFFERENTIAL.
CA002233777A CA2233777A1 (en) 1996-11-12 1998-04-29 Method and device for adaptive differential pulse code modulation
EP98401071A EP0954129A1 (en) 1996-11-12 1998-04-30 Method and device for adaptive differential pulse code modulation.
US09/070,013 US20010043655A1 (en) 1996-11-12 1998-04-30 Method and device for adaptive differential pulse code modulation
JP10159805A JPH11340837A (en) 1996-11-12 1998-05-01 Adaptive differential pulse code modulation method and its device

Publications (2)

Publication Number Publication Date
ES2124664A1 ES2124664A1 (en) 1999-02-01
ES2124664B1 true ES2124664B1 (en) 1999-11-16

Family

ID=31499581

Family Applications (1)

Application Number Title Priority Date Filing Date
ES009602387A Expired - Lifetime ES2124664B1 (en) 1996-11-12 1996-11-12 METHOD AND DEVICE OF CODING FOR MODULATION BY CODED IMPULSES ADAPTIVE DIFFERENTIAL.

Country Status (5)

Country Link
US (1) US20010043655A1 (en)
EP (1) EP0954129A1 (en)
JP (1) JPH11340837A (en)
CA (1) CA2233777A1 (en)
ES (1) ES2124664B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437087A (en) * 1982-01-27 1984-03-13 Bell Telephone Laboratories, Incorporated Adaptive differential PCM coding
US4516241A (en) * 1983-07-11 1985-05-07 At&T Bell Laboratories Bit compression coding with embedded signaling
CA1208789A (en) * 1983-11-25 1986-07-29 Peter E. Chow Adpcm encoder/decoder with improved tracking
JPH0773218B2 (en) * 1987-04-21 1995-08-02 沖電気工業株式会社 ADPCM encoder / decoder
AUPM503794A0 (en) * 1994-04-13 1994-06-09 Australian National University, The Adpcm signal encoding/decoding system and method

Also Published As

Publication number Publication date
CA2233777A1 (en) 1999-10-29
ES2124664A1 (en) 1999-02-01
JPH11340837A (en) 1999-12-10
EP0954129A1 (en) 1999-11-03
US20010043655A1 (en) 2001-11-22

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